Colors 如何在gnuplot中用可见光谱的颜色填充矩形？

如何在图形的矩形中绘制由视觉光谱颜色填充的矩形

我们绘制的矩形如下所示：

将对象1矩形从第一个6545、图形0设置为第一个6580、图形1填充颜色设置为“？”

我在这里面找到了颜色

---

如何做到这一点，请？

如果您只需要对颜色有一个粗略的印象，下面是一个简单、快速和肮脏的方法（仍有待调整）。确保

set samples

设置得足够高，以便您有足够的

脉冲

，并且不会出现白线（背景）。 如果您需要在另一个图形中使用此光谱，请通过调整

原点

和

大小

创建一个带有

多点

的插入图。在gnuplot中使用

help multiplot

、

help origin

和

help size

但是，如果您需要更精确的颜色表示，请检查您提供的链接处的链接

代码：

### visible spectrum ("quick and dirty")
reset session

set palette defined (380 "black", 400 "dark-violet", 440 "blue",  490 '#00b0c0', 530 "green", 560 "yellow", 620 "red", 780 "black")

set samples 1000
unset colorbox

plot [380:780] '+' u 1:(1):1 w impulse lc palette notitle
### end of code

### visible spectrum ("quick and dirty")
# inserted into another plot
reset session

set palette defined (380 "black", 400 "dark-violet", 440 "blue",  490 '#00b0c0', 530 "green", 560 "yellow", 620 "red", 780 "black")

set samples 1000
unset colorbox

set multiplot 
    plot cos(x)+0.2*x

    set origin 0.05,0.75
    set size 0.45, 0.2
    unset tics
    plot [380:780] '+' u 1:(1):1 w impulse lc palette lw 1 notitle

unset multiplot
### end of code

### visible spectrum ("quick and dirty")
# below curve
reset session

set palette defined (380 "black", 400 "dark-violet", 440 "blue",  490 '#00b0c0', 530 "green", 560 "yellow", 620 "red", 780 "black")

set samples 1000
unset colorbox

f(x) = sin((x-380)/25)*cos((x-580)/10) + 2

plot [380:780] '+' u 1:(f(x)):1 w impulse lc palette notitle, \
     f(x) w l lw 2 lc rgb "black" notitle
### end of code

结果：

### visible spectrum ("quick and dirty")
reset session

set palette defined (380 "black", 400 "dark-violet", 440 "blue",  490 '#00b0c0', 530 "green", 560 "yellow", 620 "red", 780 "black")

set samples 1000
unset colorbox

plot [380:780] '+' u 1:(1):1 w impulse lc palette notitle
### end of code

### visible spectrum ("quick and dirty")
# inserted into another plot
reset session

set palette defined (380 "black", 400 "dark-violet", 440 "blue",  490 '#00b0c0', 530 "green", 560 "yellow", 620 "red", 780 "black")

set samples 1000
unset colorbox

set multiplot 
    plot cos(x)+0.2*x

    set origin 0.05,0.75
    set size 0.45, 0.2
    unset tics
    plot [380:780] '+' u 1:(1):1 w impulse lc palette lw 1 notitle

unset multiplot
### end of code

### visible spectrum ("quick and dirty")
# below curve
reset session

set palette defined (380 "black", 400 "dark-violet", 440 "blue",  490 '#00b0c0', 530 "green", 560 "yellow", 620 "red", 780 "black")

set samples 1000
unset colorbox

f(x) = sin((x-380)/25)*cos((x-580)/10) + 2

plot [380:780] '+' u 1:(f(x)):1 w impulse lc palette notitle, \
     f(x) w l lw 2 lc rgb "black" notitle
### end of code

添加：

### visible spectrum ("quick and dirty")
reset session

set palette defined (380 "black", 400 "dark-violet", 440 "blue",  490 '#00b0c0', 530 "green", 560 "yellow", 620 "red", 780 "black")

set samples 1000
unset colorbox

plot [380:780] '+' u 1:(1):1 w impulse lc palette notitle
### end of code

### visible spectrum ("quick and dirty")
# inserted into another plot
reset session

set palette defined (380 "black", 400 "dark-violet", 440 "blue",  490 '#00b0c0', 530 "green", 560 "yellow", 620 "red", 780 "black")

set samples 1000
unset colorbox

set multiplot 
    plot cos(x)+0.2*x

    set origin 0.05,0.75
    set size 0.45, 0.2
    unset tics
    plot [380:780] '+' u 1:(1):1 w impulse lc palette lw 1 notitle

unset multiplot
### end of code

### visible spectrum ("quick and dirty")
# below curve
reset session

set palette defined (380 "black", 400 "dark-violet", 440 "blue",  490 '#00b0c0', 530 "green", 560 "yellow", 620 "red", 780 "black")

set samples 1000
unset colorbox

f(x) = sin((x-380)/25)*cos((x-580)/10) + 2

plot [380:780] '+' u 1:(f(x)):1 w impulse lc palette notitle, \
     f(x) w l lw 2 lc rgb "black" notitle
### end of code

也许是这样的：

代码：

### visible spectrum ("quick and dirty")
reset session

set palette defined (380 "black", 400 "dark-violet", 440 "blue",  490 '#00b0c0', 530 "green", 560 "yellow", 620 "red", 780 "black")

set samples 1000
unset colorbox

plot [380:780] '+' u 1:(1):1 w impulse lc palette notitle
### end of code

### visible spectrum ("quick and dirty")
# inserted into another plot
reset session

set palette defined (380 "black", 400 "dark-violet", 440 "blue",  490 '#00b0c0', 530 "green", 560 "yellow", 620 "red", 780 "black")

set samples 1000
unset colorbox

set multiplot 
    plot cos(x)+0.2*x

    set origin 0.05,0.75
    set size 0.45, 0.2
    unset tics
    plot [380:780] '+' u 1:(1):1 w impulse lc palette lw 1 notitle

unset multiplot
### end of code

### visible spectrum ("quick and dirty")
# below curve
reset session

set palette defined (380 "black", 400 "dark-violet", 440 "blue",  490 '#00b0c0', 530 "green", 560 "yellow", 620 "red", 780 "black")

set samples 1000
unset colorbox

f(x) = sin((x-380)/25)*cos((x-580)/10) + 2

plot [380:780] '+' u 1:(f(x)):1 w impulse lc palette notitle, \
     f(x) w l lw 2 lc rgb "black" notitle
### end of code

结果：

### visible spectrum ("quick and dirty")
reset session

set palette defined (380 "black", 400 "dark-violet", 440 "blue",  490 '#00b0c0', 530 "green", 560 "yellow", 620 "red", 780 "black")

set samples 1000
unset colorbox

plot [380:780] '+' u 1:(1):1 w impulse lc palette notitle
### end of code

### visible spectrum ("quick and dirty")
# inserted into another plot
reset session

set palette defined (380 "black", 400 "dark-violet", 440 "blue",  490 '#00b0c0', 530 "green", 560 "yellow", 620 "red", 780 "black")

set samples 1000
unset colorbox

set multiplot 
    plot cos(x)+0.2*x

    set origin 0.05,0.75
    set size 0.45, 0.2
    unset tics
    plot [380:780] '+' u 1:(1):1 w impulse lc palette lw 1 notitle

unset multiplot
### end of code

### visible spectrum ("quick and dirty")
# below curve
reset session

set palette defined (380 "black", 400 "dark-violet", 440 "blue",  490 '#00b0c0', 530 "green", 560 "yellow", 620 "red", 780 "black")

set samples 1000
unset colorbox

f(x) = sin((x-380)/25)*cos((x-580)/10) + 2

plot [380:780] '+' u 1:(f(x)):1 w impulse lc palette notitle, \
     f(x) w l lw 2 lc rgb "black" notitle
### end of code

另一个变化：

代码：

### visible spectrum ("quick and dirty")
reset session

set palette defined (380 "black", 400 "dark-violet", 440 "blue",  490 '#00b0c0', 530 "green", 560 "yellow", 620 "red", 780 "black")

set samples 1000
unset colorbox

plot [380:780] '+' u 1:(1):1 w impulse lc palette notitle
### end of code

### visible spectrum ("quick and dirty")
# inserted into another plot
reset session

set palette defined (380 "black", 400 "dark-violet", 440 "blue",  490 '#00b0c0', 530 "green", 560 "yellow", 620 "red", 780 "black")

set samples 1000
unset colorbox

set multiplot 
    plot cos(x)+0.2*x

    set origin 0.05,0.75
    set size 0.45, 0.2
    unset tics
    plot [380:780] '+' u 1:(1):1 w impulse lc palette lw 1 notitle

unset multiplot
### end of code

### visible spectrum ("quick and dirty")
# below curve
reset session

set palette defined (380 "black", 400 "dark-violet", 440 "blue",  490 '#00b0c0', 530 "green", 560 "yellow", 620 "red", 780 "black")

set samples 1000
unset colorbox

f(x) = sin((x-380)/25)*cos((x-580)/10) + 2

plot [380:780] '+' u 1:(f(x)):1 w impulse lc palette notitle, \
     f(x) w l lw 2 lc rgb "black" notitle
### end of code

结果：

### visible spectrum ("quick and dirty")
reset session

set palette defined (380 "black", 400 "dark-violet", 440 "blue",  490 '#00b0c0', 530 "green", 560 "yellow", 620 "red", 780 "black")

set samples 1000
unset colorbox

plot [380:780] '+' u 1:(1):1 w impulse lc palette notitle
### end of code

### visible spectrum ("quick and dirty")
# inserted into another plot
reset session

set palette defined (380 "black", 400 "dark-violet", 440 "blue",  490 '#00b0c0', 530 "green", 560 "yellow", 620 "red", 780 "black")

set samples 1000
unset colorbox

set multiplot 
    plot cos(x)+0.2*x

    set origin 0.05,0.75
    set size 0.45, 0.2
    unset tics
    plot [380:780] '+' u 1:(1):1 w impulse lc palette lw 1 notitle

unset multiplot
### end of code

### visible spectrum ("quick and dirty")
# below curve
reset session

set palette defined (380 "black", 400 "dark-violet", 440 "blue",  490 '#00b0c0', 530 "green", 560 "yellow", 620 "red", 780 "black")

set samples 1000
unset colorbox

f(x) = sin((x-380)/25)*cos((x-580)/10) + 2

plot [380:780] '+' u 1:(f(x)):1 w impulse lc palette notitle, \
     f(x) w l lw 2 lc rgb "black" notitle
### end of code

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非常感谢，如何将其与另一个图表连接起来？有比多点法更简单的方法吗？